Dyfyniad APA

Federation of Sewage Works Associations. (1928). Sewage works journal. Federation of Sewage Works Associations.

Dyfyniad Arddull Chicago

Federation of Sewage Works Associations. Sewage Works Journal. [Easton, Pa.: Federation of Sewage Works Associations, 1928.

Dyfyniad MLA

Federation of Sewage Works Associations. Sewage Works Journal. Federation of Sewage Works Associations, 1928.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.